氧化镁膨胀剂在水利工程中的研究进展

Research Progress of MgO Expansive Agent in Water Conservancy Engineering

氧化镁膨胀剂(MEA)已被证实是一种可以有效补偿混凝土收缩的膨胀剂,且在我国水利工程中取得了多项应用。文中系统总结了应用于水工混凝土中的S-MEA的膨胀机理,并对S-MEA水泥净浆的流变性能、S-MEA水工混凝土的产期力学性能及体积稳定性、抗氯离子侵蚀性能、抗硫酸盐侵蚀性能及抗碳化等耐久性能进行了概述,以期为S-MEA在水工混凝土中的应用提供参考。

MgO expansive agent(MEA)has been proven to be an effective expansion agent that can compensate for the shrinkage of concrete,and it has achieved several applications in water conservancy projects in China.This paper systematically summarizes the expansion mechanism of S-MEA applied in hydraulic concrete,and gives an overview of the rheological properties of S-MEA cement slurry,the yield mechanical properties and volume stability of S-MEA hydraulic concrete,the durability properties such as resistance to chloride erosion,sulfate erosion,and carbonation,to provide reference for the application of S-MEA in hydraulic concrete.